Connecting base plate



description in connection with STATES PATET OFFICE CONNECTING BASE PLATEIgnatius J. Israelski,

to Federal New York, N. 11.,

Jersey City, N. J., assignor Telephone and Radio Corporation,

a corporation of Delaware Application January 20, 1945, Serial No.573,795

The present invention relates to a base plate used for mechanically andelectrically interconnecting two electrical devices, such as a converterwith a regulator.

Mounting one electrical device upon the top of the other, it could notbe avoided that the wires of the electrical connections were exposed andconsequently, when working with tools, short circuits damaged thosedevices.

It is, therefore, the main object of the present invention to providebox-like means in which the electrical and mechanical connectionsbetween two electrical devices are concealed and not easily accessible.

An additional object of the present invention is to provide box-likemeans for receiving the electrical and mechanical connections betweentwo electrical devices, whereby the box is open at its bottom to beclosed up by the flat surface of the electrical device on which the boxis mounted.

It is another additional object of the present 2 Claims. I Cl. 173-328)necting box formed as 2 I Fig. 3 is a bottom plan view of Figure 4 is afragmentary cross the base plate. sectional view of the regulator,showing one of the slotted bolts.

the intercona base plate consists of a plate I of preferably metalsheet, the edges 2 of which are bent downwards as shown in Fig. 2,thereby providing a hollow body with an open base. Four lowered holes 3are provided near the four corners of the plate I to receive screw bolts(in dotted lines) attaching the plate I securely to the surface Ia of anelectric device, as a converter to which another electrical device, as aregulator, is to be connected. This other electrical device (not shown)has a three-point Referring now to the drawings,

connection withthe base plate I by fastening invention to provide aconnecting box formed of abase plate with turned over edges thus beingopen at its bottom whereby the edges being pressed against the surfaceof the electrical device onwhich the base plate is mounted.

A further object of the present invention is to provide simple meanswhich assure simple connection and easy removal of one electrical devicefrom the other by quick mechanical and electrical connection anddisconnection, respectively.

It is another object of the present invention to provide'means forfastening the base plate to one electrical device which base plate isequipped with terminals electrically connected with the leads from theother electrical device.

It is a further object of the present invention to provide springconnections for mounting of another electrical device on the base plate,in order to have fast connecting and'removing It is still another objectof the present invention to provide plug-like means for connecting theleads of one electrical device with spring.

contact means of the base plate and to connect said electrical devicewith the terminals receiving the leads from the other electrical view ofthe connecting three springs 4 below corresponding holes 5 in the baseplate I, which holes are adapted to receive connecting bolts of theother electrical device, as a regulator.

On one side of the plate I a grommet 6 is I provided which is adapted tointroduce the leads of theconverter to the terminals fastened to thebase plate I.

In order to provide the necessary four terminals for the electricalconnection of the leads of the converter with the base plate I thelatter is equipped with eight holes 1 arranged in four pairs (Fig. 3).Below the base plate I, where the holes 1 are arranged, two insulatingplates 9 and I0, respectively, are provided in spaced relation and areheld in the distanced position by insulating tubes 8, which tubes 8serve not only, as stated as distancing but also as insulating means.Four lugs II extending parallel in one direction and four springs I2extending parallel in the other direction are provided between the twoinsulating plates 9 and I0. Rivets I3 extending through the base plateI, the upper inlower insulating plate I0, keep all these elements v inproper position close to lower face of the base plate I ,whereby thetubes 8 insulate the rivets I3 from the lugs II and the springs I2. Thebase plate I has a longitudinal cutout Hi Just above the ends of thesprings I2 and the upper insulating base plate 9 is equipped with fouropenings I5 in order to receive electrical contacts I5a from theregulator to be mounted on the interconnecting base plate I. Just abovethe four lugs II the base plate is equipped with another cutout I6 whichhas on one side a tongue-like projection I1. special plate I8 by meansof a screw l9. This cutout I6 is necessary to allow the electricalconnection of the leads from the converter to the The cutout I6 can becovered by a 3 four lugs II representing the terminals of the base plateI and after securing the latter connection the plate II covers up thecutout I and the terminals II.

In order to connect the regulator with the converter, it is necessary tofasten the box formed as a base plate I to the surface of the converterby inserting screw bolts (Fig. 2, in dotted lines) into the holes 3 ofthe box, thereby using the surface of the converter as base for the box.Then the cable from the converter is drawn through the grommet 6 and thewires connected with the four lugs I'I', then the plate I0 screwed onthe plate I by means of the screw I9. In order to mount the regulator onthe base plate I, three slotted bolts 190., shown in Figure 4 of theregulator 20a are inserted into the holes ii of the base plate I and byturning the bolts 90 the regulator is automatically secured to the baseplate I due to the springs l. The four contact bolts of the regulatorare inserted into the respective holes I5 of the upper insulating plate9 through the cutout ll of the base plate I and the mechanical andelectrical connections with the base plate I and thereby with theconverter is achieved. It is possible to remove the regulator inshortest time just by disconnecting the contact bolts of the regulatorfrom the holes I5 and to turn the connecting bolts of the regulator 90,whereupon the regulator can be removed merely by lifting from the baseplate i.

The construction according to the present invention provides a boxtightly fastened to the plane surface of one of the electric devices,which box receives and covers up entirely the electric connectionbetween the mentioned and another electrical device to be mounted on theflat box, yet still allows fast disconnection of the electrical andmechanical connection means of the said other electrical device. Thus avery simple interconnecting means between two electrical devices isachieved, which means contains all advantages aimed for in theconnection of two devices.

While I have disclosed the principles of my invention in connection withone embodiment, it

' will be understood that this embodiment is given 4 by way of exampleonly and not as limiting the scope of the invention as set forth in theobjects and appended claims.

What I claim is:

1. A connecting base plate between two electrical devices, comprising abox open at the bottom, a top plate substantially flat, a plurality ofterminals insulatedly fastened to said top plate withinthe box, aplurality of contact springs,

each of which is connected with one of said terminals, said fasteningand connecting means being such as to maintain both the terminals andspring contacts accessible through openings in said top plate, saidcontact springs being adapted to receive contact bolts of one of thesaid electrical devices, and portions of said base plate being depressedfrom the plane of said top toward the plane of its open bottom, andperforated to secure said plate to the substantially plane surface ofthe other one of said electrical devices.

2. A connecting plate according to claim 1, in which said top plate isprovided with an opening near one edge for entering conductors to beunited to said terminals and in which a removable cover plate isprovided for the opening affording access to said terminals.

IGNATIUS 'J. ISRAELSKI.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

